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Be it known that I, LYMAN DERBY, of the city, county, and Stnte of New York, have invented a. new and improved Thin-Coupling, and that the following description, tshen in connection with the accompanying drowings/hereinnfter referred to, foruis a. full and exact specification of the some, wherein I have set forth'thc nature and principles of my said improvements, by which my invention may be distinguished from all others of n similor class, together with such ports as I claim, and desire to have secured to me by Lettcrs'Potcnt.

This invention relates-to a. new and improved mode 'of securing thills to uxlcs, whereby the former may be readily applied to and detached fro mthe latter, and at the shine time a. secure connection obtained, one that will not admit of a. casual detachment of the thills from the axle. In the accompanying sheet of drawings-- Figure is 52. side sectional view of my invention, when in the line on :r, fig. 2.

Fi ure 2, a. plan or tepvicw of the same Similar lettci's of reference indicate like parts. i

A represents a portion of the front axle of a vehicle, and B e. clip fitted thereon, having two pnrsllel'cm's or lugs a a. projecting from its front end, between which a metal roller, 0, coveredwith India. rubber I), is fitted and allowed to turn freely, the roller being placed on a. bolt, D, which passes horizontallythrcugh' the cars 01' 1 lugs a a, ond seoui'ed in position by n screw-nut, e,'on one end. The lugs a ghzwe a bottom plate, d, firmly secured between them, the upper surface of said plate being slightly curved in a. longitudinal direction, as shown.

clearly in fig. 1.- E represents the thill-iron, which extends back beyond the rear end of the thill in a. curved form, as shown in fig. 1'. 'This curved port is inserted between the bottom piste d of theears or lugs a annd the roller 0 by raising the thills, and as the latter are let down to the line of drought, or further, so that their outer ends will come in contact with the ground, the ironE will bind or catch between the roller and bottom plate and forms secure connection of the thill to the axle, eflectuully preventing the casual detachment of the former from the latter. In order to detach the thills all that is required, is simply to raise the thills some distance above the line of drought, out-he position they occupy when the horse is attached to the" vehicle, and the iron B may be readily drawn out from between the roller and bottom plate. This invention does not admitof any rattling of the ports of the coupling, and it may be constructed at a very modernize cost.

Having thus described my invention, I claim as new, and desire to secure by Letters Patent-- .The curved thill-iron E, in combination with the roller 0, covered with India. rubber or other suitable material, cud fitted between lugs or ears on a at the front side of the clip B, and the bottom plate a oi the lugs or cars, curved at its upper surface, substantially as shown and described. 7

- LYMAN DERBY Witnesses:

WM. F. McNAnAni-i,

ALEX. F. Ronss'rs. 

